ASTM D5939-96

Standard Test Method for Injection Moulding of Test Specimens of Thermoplatic Materials (Withdrawn 1998)

General Information

• Status: Withdrawn
• Withdrawal Date: 09-Apr-1998
• ICS: 83.080.20 - Thermoplastic materials
• Technical Committee: D20 - Plastics
• Drafting Committee: D20.16 - Thermosetting Materials

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: D 5939 – 96
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Practice for
Preparing Multipurpose Test Specimens and Bars of
1
Thermoplastics by Injection Moulding
This standard is issued under the fixed designation D 5939; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope D 5942 Test Method for Determining Charpy Impact
3
Strength of Plastics
1.1 This practice covers the general principles to be fol-
4
2.2 ISO Standards:
lowed for injection moulding test specimens of thermoplastics
ISO 179:1993 Plastics—Determination of Charpy Impact
and gives details of mould designs for preparing specimen
Strength
types for reference data, that is, for multipurpose-test speci-
ISO 294-1 Injection Moulding of Test Specimens of Ther-
mens according to ISO 3167 (Specification D 5936) and for
moplastic Materials—Part 1: General Principles, Multi-
bars 80 mm 3 10 mm 3 4 mm. This practice provides a basis
purpose Test Specimens and Bars
for establishing reproducible moulding conditions. This prac-
ISO 294-2 Plastics—Injection Moulding of Test Specimens
tice promotes uniformity in describing the various essential
of Thermoplastics—Part 2: Small Tensile Bars (ISO
parameters of the moulding operation and also establishes a
Mould Type C)
uniform practice in reporting moulding conditions. The special
ISO 294-3 Plastics—Injection Moulding of Test Specimens
conditions required to prepare test specimens in a comparable
of Thermoplastics—Part 3: Small Plates (ISO Moulds
and reproducible state will vary for each material used. These
Type D)
conditions are given in the ISO standard for the relevant
ISO 294-4 Plastics—Injection Moulding of Test Specimens
material or are to be agreed upon between interested parties.
of Thermoplastics—Part 4: Determination of Moulding
NOTE 1—ISO round-robin tests with acrylonitrile/butadiene/styrene
Shrinkage
(ABS), styrene/butadiene (S/B) and polymethylmethacrylate (PMMA)
ISO 3167:1993 Plastics—Multipurpose Test Specimens
showed that design of the mould is one of the important factors in
ISO 10350:1993 Plastics—The Acquisition and Presenta-
preparation of test specimens.
tion of Comparable Single-Point Data
1.2 This practice is identical to ISO 294-1. This standard is
ISO 11403-1:1994 Plastics—Acquisition and Presentation
comparable to Practice D 3641 but neither standard should be
of Comparable Multipoint Data—Part 1: Mechanical
substituted for the other.
Properties
1.3 This standard does not purport to address all of the
ISO 11403-2 Plastics—Acquisition and Presentation of
safety concerns, if any, associated with its use. It is the
Comparable Multipoint Data—Part 2: Thermal and Pro-
responsibility of the user of this standard to establish appro-
cessing Properties
priate safety and health practices and determine the applica-
ISO 11403-3 Plastics—Acquisition and Presentation of
bility of regulatory limitations prior to use.
Comparable Multipoint Data—Part 3: Environmental In-
fluences on Properties
2. Referenced Documents
2.1 ASTM Standards:
3. Terminology
D 3641 Practice for Injection Molding Test Specimens of
3.1 Definitions of Terms Specific to This Standard:
2
Thermoplastic Molding and Extrusion Materials
3.1.1 cavity, n—the part of hollow space of the mould that
D 5935 Practice for Plastics—Acquisition and Presentation
forms one specimen.
3
of Comparable Single-Point Data
3.1.2 clamping force F , n—the force clamping the plates
M
D 5936 Specification for Multipurpose Test Specimens
of the mould. It is expressed in kilonewton, kN. The minimum
3
Used for Testing Plastics
clamping force is calculated according to Eq 1.
D 5940 Practice for Preparing Small Plate Test Specimens
23
3
F $ A 3 P 3 10 (1)
of Thermoplastics by Injection Moulding M P max
where:
1
This practice is under the jurisdiction of ASTM Committee D-20 on Plastics
and is the direct responsibility of Subcommittee D20.61 on U.S. Technical Advisory
Group for ISO/TC 61 on Plastics.
Current edition approved June 10, 1996. Published August 1996.
2 4
Annual Book of ASTM Standards, Vol 08.02. Available from American National Standards Institute, 11 W. 42nd St., 13th
3
Annual Book of ASTM Standards, Vol 08.03. Floor, New York, NY 10036.
1

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D 5939
F 5 the clamping force (see 3.1.2), in kN,
M
2
A 5 the projected area (see 3.1.18), in mm , and
P
P 5 the maximum value of the melt pressure (see
max
3.1.12), in MPa.
3.1.3 cooling time t , n—the time from th
...